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  1. PO
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    <p>Can't you use <code>Enumerable.Except</code> ?</p> <blockquote> <pre><code>public static IEnumerable&lt;TSource&gt; Except&lt;TSource&gt;( this IEnumerable&lt;TSource&gt; first, IEnumerable&lt;TSource&gt; second ) </code></pre> </blockquote> <p>More <a href="http://msdn.microsoft.com/en-us/library/bb300779.aspx" rel="nofollow noreferrer">details</a>.</p> <p>An example tested in <a href="http://www.sliver.com/dotnet/SnippetCompiler/" rel="nofollow noreferrer">Snippet Compiler</a></p> <pre><code>using System; using System.Linq; using System.Collections.Generic; class ColumnDefinition : IEquatable&lt;ColumnDefinition&gt; { public string Name { get; set; } public string Type { get; set; } public string Attr { get; set; } public ColumnDefinition() { Name = string.Empty; Type = string.Empty; Attr = string.Empty; } public bool Equals(ColumnDefinition other) { return Name.Equals(other.Name) &amp;&amp; Type.Equals(other.Type) &amp;&amp; Attr.Equals(other.Attr); } public override bool Equals(object value) { return (value is ColumnDefinition) ? Equals(value as ColumnDefinition) : false; } public override int GetHashCode() { return Name.GetHashCode() ^ Type.GetHashCode() ^ Attr.GetHashCode(); } public override string ToString() { return string.Concat("{", Name, ":", Type, ":", Attr, "}"); } } public class Program { public static void Main(string[] args) { try { MyMain(args); } catch (Exception e) { Console.WriteLine(e); } finally { Console.ReadKey(); } } public static void MyMain(string[] args) { var list1 = new [] { new ColumnDefinition { Name = "foo", Type = "int", Attr = "0" }, new ColumnDefinition { Name = "bar", Type = "int", Attr = "1" }, }; var list2 = new [] { new ColumnDefinition { Name = "foo", Type = "int", Attr = "0" }, new ColumnDefinition { Name = "bar", Type = "string", Attr = "1" }, }; foreach (var changed in Enumerable.Except(list1, list2)) { Console.WriteLine(changed); } } } </code></pre>
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    1. POC# Comparing Two Custom Lists
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    1. UStypeseven
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    1. COI gave it a shot but it returns records when it shouldn't return anything in my test.
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    2. COHave you implemented a proper equality comparer for your ColumnDefinition class? If not, please do. The Enumerable.Except/Intersect/Union functions depend on it.
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      1. UStypeseven
    3. COOh, I've never done that before. I will give it a shot and see what I come with. Thanks!
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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